收到此错误-输入"Future< dynamic>"不是类型"List< dynamic>"的子类型
问题描述：
每当尝试调用将来的数据并尝试转换为 List 时，都会返回错误
Whenever trying to call future data and trying converting to List, it returns the error
"Future"类型不是"List"类型的子类型
type 'Future' is not a subtype of type 'List'
尝试类型转换，但无济于事
Tried type-casting, but no help
在HomePage.dart上
On HomePage.dart
final getPost = NetworkFile().getPosts();
List posts;
void getPostsList() {
setState(() {
var res = getPost;
posts = res as List<dynamic>;
print(posts);
});
}
在Network.dart上
On Network.dart
class NetworkFile{
Future<dynamic> getPosts() async {
var response = await http.get('$kBlogURL' + 'posts?_embed');
Iterable resBody = await jsonDecode(response.body.toString());
return resBody;
}
}
答
您正在解码响应及其类型为 dynamic 的 List .处理它的方法很少.您可以创建一个简单的PODO类并对其进行强制转换/映射.或只是如下所示:
You are decoding the response and its a List of type dynamic. There are few method to handle it. You can create a simple PODO class and cast/mapped to it. Or just do like below:
List posts = [];
void getPostsList() async {
final fetchedPosts = await NetworkFile().getPosts();
setState(() {
posts = fetchedPosts;
});
print(posts);
}